Fix #978 -- Allow to split names (#1049)

- [x] attendee names
- [x] Invoice address names
- [x] Data migration
- [x] API serializers
  - [x] orderposition
  - [x] cartposition
  - [x] invoiceaddress
  - [x] checkinlistposition
- [x] position API search
- [x] invoice API search
- [x] business/individual required toggle
- [x] Split columns in CSV exports
- [x] ticket editor
- [x] shredder
- [x] ticket/invoice sample data
- [x] order search
- [x] Handle changed naming scheme
- [x] tests
- [x] make use in:
  - [x] Boabee
  - [x] Certificate download order
  - [x] Badge download order
  - [x] Ticket download order
- [x] Document new MySQL requirement
- [x] Plugins

src/requirements/postgres.txt

@@ -1,2 +0,0 @@
-psycopg2-binary
-

src/requirements/production.txt

@@ -34,6 +34,8 @@ babel
 django-i18nfield>=1.4.0
 django-hijack>=2.1.10,<2.2.0
 django-oauth-toolkit==1.2.*
+django-jsonfallback
+psycopg2-binary
 # Stripe
 stripe==2.0.*
 # PayPal